Antiskid device



lvifay 25, 1925.,

NETE@ STATES GUSTAVE G. ENGBERG", Olii ST. EAUL, MINNESOTA.

ANTSKID DEVICE.

Application filed August 6, 1523. Serial No. 655,857.

My invention relates to anti-skid device-s and has 'l'or its object to provide a device which is adapted to be readily attached to a vehicle tire to prevent the same irom skidding and to give the wheel suitable traction.

linothe r object ot the invention is to provide a device having ay curved contour :idajtcd to tit over the tread ot the tire and to maintain its shape when mounted thereon so as to provide a substantial gripsur tace upon the ground. Another object is to provide a pair ot clmnpiiig members pivotally connected to said first nained member which are adapted to rigidlylclamp the device securely in place upon the tire.

Another objectresides in forming one of said clamping members with an angular port-ion adapted to fit over the side ot the tire and rim and to lie tlat upon the telly of the wheel and to provide the other ot the said clamping members with an operating lever connected thereto by means of a wire link, which operating member is adapted to engage said angular member to clamp the device in place.

A still 'further object of the invention resides in providing a number of diagonal and parallel bars on said first named member having engaging surfaces adapted to engage the ground to prevent the skidding ot the vehicle tire and to secure traction.

A still further .object resides in constructing a device so that the same may be made oi .'fnalleable castings, thereby greatly reducing the cost of the invention.

Further objects and advantages of my invention reside in the detailed construction of the same as brought out in the following specification and claim.

In the drawings illustrating my invention in one form:

Figure 1 is a plan view of the device prior to the attachment of the same .to the vehicle tire.

Figure 2 is a sectional view of the tire showing the invention applied thereto.

Figure 3 is a view similar to Figure 2 showing the clamping members engaging one another and about to be closed to clamp the device in place.

Figure 4 is a side elevational View oi' a portion of the vehicle wheel and tire showing my invention attached thereto and drawn toa reduced scale.

In the use or' anti-skid devices for vehicle tires considerable difficulty hasbeen found in that it frequently becomes necessary to jack up the rear axle of the Avehicle in order to attach the anti-skid device thereto. With my invention this diiiiculty is overcome in i.lnoviding a number or independent units which may be individually attached to the tire at the required intervals without necessitating the acking up of the hind wheel.

In addition the device is quickly and'securely attached to the tire so that once the same has been placed upon the tire, said device remains securely in position.

ln the drawings I have shown a portion of: a vehicle wheel A having spokes 10, a telly 11 and a rim 12. tached a pneumatic tire 13 of ordinary construction.

My invention comprises ground engaging member 14 which consists of two arcuate bars 15 and 16 adapted to lit around the circumference of the tire 12, which bars are connected together by means of three longitudinal bars 17, 18 and 19, which are also slightly curved to tit the contour of the tire. Between the bars 17, 18 and 19 are positioned transverse bars 2O and 21 which are positioned diagonally relative to the device and which intersect at the center of the same as is clearly shown in Figure 1. Upon the bars 15, 16, 2O and 21 are formed upwardly extending ribs 22 which are adapted to engage the ground and which provide anti-friction means for preventing the vehicle wheel from skiddingor slipping upon the ground and giving suitable traction.

For attaching the device to the wheel proper, the bars 17 and 19 which lie along the sides of the tire are formed with four cylindrical Shanks 23, 24, 45 and 46, which are positioned between the respective cross bars 15, 20, 21 and 16. To the Shanks 23 and 24 are attached two angularly formed clamp members 25 and 26 which are constructed with hooked portions 27 adapted to be hooked about the Shanks 23 and 24 which members have side portions 28 adapted to lie along the side of the telly 11 and the tire 13 and which have angularly disposed portions 29 adapted to rest upon and be seated upon the inner surface 'ot the Jfelly 11 as clearly shown in Figure 2. To the other shanks and 46 are pvotally eenprimarily a Upon the rim 12 is at- 2 lessees nected'arms 30 which havehooled potions :El similar to the li olred portions 2T adapted to pass around the said shanlrs. These arms a e turther provided at their ends with other` hooked portions 32 to 'which are pivoed wire links S3 shovvn in detail Figure l. t the other ends of the linlqs 33 are pi"- oted b v means ot hoolrs two levers 3l and 35, which levers arey formed with portion 3G adapted to rest upon the portion 2) ot the members 25 and and are 'further provided with handles 3T isenin n outwardlf,Y therefrom which handles, when the device clamped upon the tire, follow along` the portions 28 of the said members 25 and 2G as clearl.v shown in dotted lines in At the extreme ends oi? the por levers Bl and are vformed lugs are adapted to engage sockets 'forn'ien the extreme ends ot the portions 29 members 2 and 2.6.

ln applying the device to the vehicle tire, the member 14 is placed over the tire as shown in tull lines in vFigvure 2 with the portions pivoted thereto hanging downwardly along the sides ot the tire. -.iembers 23 and 2G are then swung inwardly to take the position shown in Figure 3 and the levers 3l and 35 manipulated to bring lugs 38 into cooperation With the sockets 39 as shown in this figure. .By pressing 'the handles 37 o1" these levers inwardly, the said levers are caused to take the position shown in dotted lines in Figure 2. lt Will be noted that, When so closed, the Wire linls 33 sume an angular position relative to the portions 28 ol members 25 and 26 vvhieh tends to hold the said levers 3ft anc, in place. By this means, when once the device has been clamped in place, the same is securel;7 held from loosening or removal until the hardles 3T are again moved upwardly to rel L ease thj device.

ln the construction of the device, the Darts are preferably east of malleable iron ivith the hooks 27, 3l and 32 cast open. ln assembling the parts, these hooks are closed by squeeying the same together' which com` pletes the operation required for this purpose. in crceedinoly simple and econoniical device to manufacture is secured, which, at he saine time, vhen once applied to the ire iirmljvv remains in place Without the hance ot accidental removal. B v 'trimming he ground engaging' member let ot one piece arranged with the transverse and diagonal bars or ribs, a device is provided .vhich effectively engages the ground to secure the desired friction for preventing shielding or giving sutlicient vtraction to the vehicle Wheel desired.

In accordance with the patent statutes, lY have described theprinciples ol operation ot my invention, together with the'apparatus which I now consider to represent the best embodiment thereof, but l' desire to have itunderstood that the constructiony shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth vithin the scope of the following claim:

l claim:

A, rigid anti-skid device comprising a ground engaging member comprising a number of transverse arcuate bars, three longitudinal bars connecting said transverse arcuate ha 's at their centers and ends, and a number ot diagonal bars connecting said longitudinal bars.

i c t onsravn o. nionnno.

lt can readiljv7 be seen in this manner r 

